VetriScience Vetri-Mega Probiotic (120 Capsules) for Dogs & Cats by Vetri-Science Laboratories Contains 8 viable probiotic strains from non-dairy sources to support proper digestive tract health during times of G.I. upset. Also included is FOS, a soluble fiber and prebiotic to support natural proliferation of intestinal probiotics. Feeding Directions for Dogs and Cats: For Dogs: Give 1 capsule daily to dogs up to 40 lbs and 2 capsules daily to dogs over 40 lbs, preferably after a meal. For Cats: Give 1/2 capsule daily mixed with food.